I made sure the batteries in the remote control were correctly in. The TV didn’t switched on.

I changed the batteries in the remote control.

It still didn’t switch on.

I didn’t check the fuse in the plug: as the little red standby light, the little red light that tells you your TV is on, but not active, was on. Electricity was getting through to the set.

I — worrying slightly — checked the internet. Amongst the various weird and wonderful bits suggestions? Were various opinions. Including one telling me that the power unit — the transformer that takes electricity from the power cable and passes it on to the TV, itself — had blown: and needing replacing.